The Javascript modification of an ASP.NET TextBox goes unnoticed

For someone skilled in this area, this task should be a breeze.

I have three components: a launch calendar button, a continue button, and a date textbox. When the button is clicked, a JavaScript calendar pops up in a new window. This calendar sets a date in the ReservationDate textbox using the following code:

window.opener.document.getElementById('ctl00_wpm_ShowProduct_ctl10_ReservationDate').value = '<%= CurrentDate %>';

Although the date appears in the field on the browser, the server-side script does not recognize it when I click the continue button. How can I ensure that the server-side script uses the text in the field displayed by the browser?

I understand that this issue stems from the difference between server-side and client-side actions, but how can I overcome this disconnect?

c#javascriptasp.net

Answer №1

It appears that the problem lies in setting your textbox as ReadOnly. This can be resolved by implementing the following code snippet in the backend:

TextBox1.Attributes.Add("readonly", "true");

For more information, refer to this link.

Answer №2

When setting the value in the Page_Load method, be aware that it may not persist throughout the page's lifecycle.

To ensure the value is retained, consider checking if the page is being posted back and only initializing if it is not:

if(!Page.IsPostBack)
{
Initialize();
}

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